Algorithme ; Amérique ; Amérique du Nord ; Canada ; Couverture neige ; Equivalent eau ; Observation par satellite ; Observation radar ; Profil vertical ; Québec
Algorithm ; America ; Canada ; North America ; Quebec ; Radar observation ; Satellite observation ; Snow cover ; Vertical profile ; Water equivalent
Algoritmo ; America ; America del norte ; Canada ; Cubierta nieve ; Equivalente agua ; Observación por satélite ; Observación radar ; Perfil vertical ; Quebec
développement d'une méthode opérationnelle d'estimation de l'équivalent en eau de la neige au sol et de cartographie de la neige humide à partir de cette technologie. L'interprétation du signal radar, de même que le développement et la validation des algorithmes
exigent la connaissance d'un très grand nombre de paramètres mesurés sur le terrain. Des lignes de neige, des profils verticaux et des sondes installées en permanence sur le territoire permettent de relever la hauteur, l'équivalent en eau, la densité, la
et d'une d'automne. Une seconde relation convertit les résistances thermiques en équivalents en eau de la neige. Dans le cas des images en mode standard (S7) de RADARSAT, l'algorithme actuel surestime de 12 à 18 % les valeurs mesurées sur le terrain.
Capa nival ; Evapotranspiración ; Hidrología ; Humedad del suelo ; Metodología ; Modelo ; Precipitación ; Recursos en agua ; Teledetección
precipitation, surface soil moisture, snow cover, snow water equivalent, leaf area index, and evapotranspiration) over the past decade. This paper also discusses the major challenges remaining in this field, and recommends the directions for further research
Corriente de agua ; España ; Infraestructura ; Obras públicas ; Paisaje
associated to a stretch of the river covering several hundred kilometres was determined and after dividing this stretch into sections, they were compared under equivalent conditions to provide a hierarchal ranking.
Agua de deshielo ; Capa nival ; Cuenca hidrográfica ; Distribución espacial ; Metodología ; Nieve ; República Checa
Data from four field measurements of the snow water equivalent (SWE) carried out in two winter seasons were assessed by ten interpolation methods. Measurements from both snow accumulation and snowmelt periods were evaluated. The ability of methods
Agua de deshielo ; Capa nival ; Distribución espacial ; Efecto orográfico ; Limite inferior de la nieve ; Nieve ; República Checa ; Régimen hidrológico ; Teledetección
Every week during the winter months, the Czech Hydrometeorological Institute (CHMI) provides up to date information on the snow water equivalent present in Czech regions and especially within important hydrological basins. The position of the zero
Canal anastomosado ; China ; Clima local ; Corriente de agua ; Dinámica fluvial ; Estudio comparativo ; Geometria hidráulica ; Medio ambiente ; Meseta ; Montaña ; Tibet ; Tsinghai ; Vegetación ribereña
Alluvial reaches in the source region of the Yangtze River exhibit predominantly braided channel planforms, while equivalent reaches in the source region of the Yellow River have more diverse planform morphologies including anastomosing/braided
of the scour hole. A key assumption is that, at any time, the scour depth evolves at the same rate as in an equivalent steady flow. Experimental data are presented that show the scour hole development downstream of bed sills due to flood hydrographs follow
Agua de deshielo ; Caudal pico ; Cuenca hidrográfica ; Gran Poloña ; Hidrología ; Polonia
from 1965, two from 1971, and one from 1979. Properties of snow cover in the selected catchments were presented, including dates of appearance and decline, duration and thickness. Snow water equivalent values were calculated. Peak high-water events
, as compared to the equivalent one-dimensional (1D) case of a flat and straight bed, having the same channel slope and average flow velocity. The calculations result in a method for correcting 1D models to account for the total sediment transport and resistance
Agua subterránea ; Erosión de los suelos ; Erosión hídrica ; Experimentación ; Humedad del suelo ; Modelo ; Propiedades del suelo ; Suelo
. The influence of the initial moisture content was apparent, with some pipes (8% moisture content) expanding so fast that limited data was collected. The mechanistic model was able to estimate equivalent flow rates to those observed in the experiments, but had
Agua ; Agua de superficie ; Anomalía climática ; Aprovechamientodel agua ; Clima ; Contaminación ; Desarrollo sostenible ; Gestión del agua ; Inundación ; Marruecos ; Necesidad de agua ; Recursos en agua ; Variabilidad climática
Abastecimiento de agua ; Agua ; Agua potable ; Calidad del agua ; Economía de las aguas ; Eslovenia ; Karst ; Manantial ; Necesidad de agua ; Planificación